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Variety of technological trajectories in low emission vehicles (LEVs): a patent data analysis

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Author Info
Vanessa OLTRA (E3i-IFReDE-GRES)
Maïder SAINT-JEAN (E3i-IFReDE-GRES)

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Abstract

This paper focuses on the diversity of engine technologies for Low Emission Vehicles (LEVs) that are developed by car manufacturers in order to substitute for the conventional internal combustion engine vehicle. Our purpose is to analyse the competition between the various technologies for LEVs as well as the innovative strategy of car manufacturers. We first propose to define and to represent these technological trajectories in order to compare their performances and to identify their strength and weaknesses. The technological bottlenecks, the barriers to the adoption of these alternative engine technologies as well as the features of this technological competition are underlined. We then use a patent data analysis to study the patent portfolios of the main car manufacturers in these technologies on the period from 1990 to 2005. The dynamics of patents applied by car manufacturers gives insight on the competition among technologies and on the strategy of firms. This analysis emphasises the progressive diversification of firms patent portfolios over the whole set of engine technologies and the differentiated strategic positioning of car manufacturers according to countries.

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Paper provided by Groupement de Recherches Economiques et Sociales in its series Cahiers du GRES with number 2006-20.

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Date of creation: 2006
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Handle: RePEc:grs:wpegrs:2006-20

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Keywords: Low emission vehicles; environmental innovation; technological competition; patent data;

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Find related papers by JEL classification:
O33 - Economic Development, Technological Change, and Growth - - Technological Change - - - Technological Change: Choices and Consequences; Diffusion Processes
Q55 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Technological Innovation
L62 - Industrial Organization - - Industry Studies: Manufacturing - - - Automobiles; Other Transportation Equipment

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  1. Studies on the automobile industry
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Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Vanessa Oltra & Maïder Saint Jean, 2005. "The dynamics of environmental innovations: three stylised trajectories of clean technology," Economics of Innovation and New Technology, Taylor and Francis Journals, vol. 14(3), pages 189-212, April. [Downloadable!] (restricted)
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  2. Griliches, Zvi, 1990. "Patent Statistics as Economic Indicators: A Survey," Journal of Economic Literature, American Economic Association, vol. 28(4), pages 1661-1707, December. [Downloadable!] (restricted)
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  3. repec:fth:harver:1473 is not listed on IDEAS
  4. Lanjouw, Jean Olson & Mody, Ashoka, 1996. "Innovation and the international diffusion of environmentally responsive technology," Research Policy, Elsevier, vol. 25(4), pages 549-571, June. [Downloadable!] (restricted)
  5. Brunnermeier, Smita B. & Cohen, Mark A., 2003. "Determinants of environmental innovation in US manufacturing industries," Journal of Environmental Economics and Management, Elsevier, vol. 45(2), pages 278-293, March. [Downloadable!] (restricted)
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  1. Vanessa OLTRA (GREThA-GRES) & Maïder SAINT JEAN (GREThA-GRES), 2007. "Incrementalism of environmental innovations versus paradigmatic change: A comparative study of the automotive and chemical industries," Cahiers du GRES 2007-19, Groupement de Recherches Economiques et Sociales. [Downloadable!]
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